If the iceman was male, then these living individuals are not descended from him but from his mother's lineage. Mitochondrial DNA is passed from mother to daughter, and this guy, as a male, could not pass his mtDNA to his children. His children would get their mother's mtDNA, not his.
And the stupid article didn't even mention which haplogroup they found! Some of us really want to know those things.
Don't fret, as an example of the MSM, if they had reported it, they would have gotten it wrong anyway.
It was a 'feel good' PC article. I've noticed most articles do not list the haplogroup.